Headboard



FIG. 1 is a perspective view of my headboard;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof; and,

FIG. 4 is a right side view, the left side (not shown) is a mirror image, of my headboard.

The broken lines are for environmental purposes only and form no part of the claimed design. 

I claim the ornamental design for a headboard, as shown and described. 